Abstract
A case study in an old city district with hot-humid climatic conditions in Wuhan, China was conducted to explore the potential renewal strategies favorable to the local residents and pedestrians. For this purpose, a comprehensive mathematical model considering the parameters such as ambient crosswind, solar radiation, natural convection, and a previously established heat transfer mechanism was employed to analyze the fluid flow and heat transfer characteristics of the study area. In addition, in the urban renewal process, five alternative renewal strategies, namely, Central Demolition (CD) Plan, Edge Demolition (ED) Plan, Wedge Shape Demolition (WSD) Plan, “L” Shape Demolition (LSD) Plan, and Cross Shape Demolition (CSD) Plan, were adopted to improve the thermal and ventilation environment of Wuhan old city district. Through simulation analysis, the temperature and velocity distributions of the original urban layout and five alternative renewal strategies were compared. It is found that the construction of an air passage within the old city district can improve the local air quality, air ventilation, and thermal environment to some extent. Among the five alternative strategies to construct air passages, CSD Plan is much better than the others. Accordingly, corresponding suggestions and strategies for urban renewal were presented.
Highlights
Urban renewal has been one of the biggest global challenges to economic and social development inChina, especially for mega and medium-sized cities during the transitional period [1,2,3,4,5,6,7,8,9]
The local outdoor micro climate and the thermal comfort of human beings have captured increasing attention [26,27,28], with the former mainly connected to urban planning and the latter related to indoor environments, based on which during the urban renewal process, in areas with hot summers and cold winters, the local outdoor micro climate and thermal comfort of the human beings in outdoor environments should be highlighted in local development plans and building layouts
This paper mainly focuses on the effectiveness of demolition strategy utilization during urban renewal to create favorable wind, air quality, and thermal environment, regardless of the influence of different solar radiation intensity, and ambient crosswind velocity (ACV) magnitude and direction on the wind and thermal environment which have been extensively analyzed in the previous work [41]
Summary
Urban renewal has been one of the biggest global challenges to economic and social development inChina, especially for mega and medium-sized cities during the transitional period [1,2,3,4,5,6,7,8,9]. Over the last few decades, along with the urban renewal process currently in place in mega cities, many subsequent serious problems concerning society [10,11,12,13], politics [14,15,16], economy [17,18,19], history [20,21], and culture [5,22] have continuously emerged. Those problems have attracted worldwide attention ever since. The local outdoor micro climate and the thermal comfort of human beings have captured increasing attention [26,27,28], with the former mainly connected to urban planning and the latter related to indoor environments, based on which during the urban renewal process, in areas with hot summers and cold winters, the local outdoor micro climate and thermal comfort of the human beings in outdoor environments should be highlighted in local development plans and building layouts
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
